74534021 has 8 divisors (see below), whose sum is σ = 76662264. Its totient is φ = 72411840.

The previous prime is 74534003. The next prime is 74534027. The reversal of 74534021 is 12043547.

It can be written as a sum of positive squares in 4 ways, for example, as 17757796 + 56776225 = 4214^2 + 7535^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 74534021 - 2⁶ = 74533957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74534027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36791 + ... + 38763.

It is an arithmetic number, because the mean of its divisors is an integer number (9582783).

Almost surely, 2^74534021 is an apocalyptic number.

It is an amenable number.

74534021 is a deficient number, since it is larger than the sum of its proper divisors (2128243).

74534021 is a wasteful number, since it uses less digits than its factorization.

74534021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3031.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 74534021 is about 8633.3088094890. The cubic root of 74534021 is about 420.8411355697.

Adding to 74534021 its reverse (12043547), we get a palindrome (86577568).

The spelling of 74534021 in words is "seventy-four million, five hundred thirty-four thousand, twenty-one".